1/* 2 * Copyright (C) 2004, 2005, 2006, 2007 Nikolas Zimmermann <zimmermann@kde.org> 3 * Copyright (C) 2004, 2005 Rob Buis <buis@kde.org> 4 * Copyright (C) 2005 Eric Seidel <eric@webkit.org> 5 * 6 * This library is free software; you can redistribute it and/or 7 * modify it under the terms of the GNU Library General Public 8 * License as published by the Free Software Foundation; either 9 * version 2 of the License, or (at your option) any later version. 10 * 11 * This library is distributed in the hope that it will be useful, 12 * but WITHOUT ANY WARRANTY; without even the implied warranty of 13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 14 * Library General Public License for more details. 15 * 16 * You should have received a copy of the GNU Library General Public License 17 * along with this library; see the file COPYING.LIB. If not, write to 18 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, 19 * Boston, MA 02110-1301, USA. 20 */ 21 22#ifndef FEComponentTransfer_h 23#define FEComponentTransfer_h 24 25#if ENABLE(FILTERS) 26#include "FilterEffect.h" 27 28#include "Filter.h" 29#include <wtf/Vector.h> 30 31namespace WebCore { 32 33enum ComponentTransferType { 34 FECOMPONENTTRANSFER_TYPE_UNKNOWN = 0, 35 FECOMPONENTTRANSFER_TYPE_IDENTITY = 1, 36 FECOMPONENTTRANSFER_TYPE_TABLE = 2, 37 FECOMPONENTTRANSFER_TYPE_DISCRETE = 3, 38 FECOMPONENTTRANSFER_TYPE_LINEAR = 4, 39 FECOMPONENTTRANSFER_TYPE_GAMMA = 5 40}; 41 42struct ComponentTransferFunction { 43 ComponentTransferFunction() 44 : type(FECOMPONENTTRANSFER_TYPE_UNKNOWN) 45 , slope(0) 46 , intercept(0) 47 , amplitude(0) 48 , exponent(0) 49 , offset(0) 50 { 51 } 52 53 ComponentTransferType type; 54 55 float slope; 56 float intercept; 57 float amplitude; 58 float exponent; 59 float offset; 60 61 Vector<float> tableValues; 62}; 63 64class FEComponentTransfer : public FilterEffect { 65public: 66 static PassRefPtr<FEComponentTransfer> create(Filter*, const ComponentTransferFunction& redFunc, const ComponentTransferFunction& greenFunc, 67 const ComponentTransferFunction& blueFunc, const ComponentTransferFunction& alphaFunc); 68 69 ComponentTransferFunction redFunction() const; 70 void setRedFunction(const ComponentTransferFunction&); 71 72 ComponentTransferFunction greenFunction() const; 73 void setGreenFunction(const ComponentTransferFunction&); 74 75 ComponentTransferFunction blueFunction() const; 76 void setBlueFunction(const ComponentTransferFunction&); 77 78 ComponentTransferFunction alphaFunction() const; 79 void setAlphaFunction(const ComponentTransferFunction&); 80 81 virtual void platformApplySoftware(); 82 virtual void dump(); 83 84 virtual TextStream& externalRepresentation(TextStream&, int indention) const; 85 86private: 87 FEComponentTransfer(Filter*, const ComponentTransferFunction& redFunc, const ComponentTransferFunction& greenFunc, 88 const ComponentTransferFunction& blueFunc, const ComponentTransferFunction& alphaFunc); 89 90 void getValues(unsigned char rValues[256], unsigned char gValues[256], unsigned char bValues[256], unsigned char aValues[256]); 91 92 ComponentTransferFunction m_redFunc; 93 ComponentTransferFunction m_greenFunc; 94 ComponentTransferFunction m_blueFunc; 95 ComponentTransferFunction m_alphaFunc; 96}; 97 98} // namespace WebCore 99 100#endif // ENABLE(FILTERS) 101 102#endif // FEComponentTransfer_h 103